It’s just business. The Kardashians’ companies have filed documents to block their future sister-in-law, Blac Chyna, from trademarking her married name, Angela Renee Kardashian. Find out more in the video above, and detailed below.

Khloe Kardashian, Kourtney Kardashian and Kim Kardashian arrive for the 22nd Annual Elton John AIDS Foundation’s Oscar Viewing Party held at West Hollywood Park on March 2, 2014 in West Hollywood, California.Karwai Tang/WireImage
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The model, 28, who recently welcomed baby Dream with fiancé Rob Kardashian in November, attempted to trademark her name to obtain sole control over the use of her name for advertising, personal appearances and promoting brands.

In documents filed on December 1, Kim, Khloéand Kourtney Kardashian’s companies — Kimsaprincess Inc., Khlomoney Inc. and 2Die4Kourt, respectively — are opposing Chyna’s trademark. The papers argue that the Kardashian sisters’ companies would “suffer irreparable injury to their reputation and goodwill if the opposed mark is allowed to register.”

Blac Chyna arrives for her birthday celebration and unveiling of her “Chymoji” Emoji Collection at Hard Rock Cafe, Hollywood, CA on May 10, 2016 in Hollywood, California.Gabriel Olsen/WireImage
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The documents claim that the trademarks are “confusingly similar” and that “the applicant [Chyna] is deliberately seeking to profit from the goodwill and popularity of Opposers’ Kardashian Marks.”

A source tells Us Weekly that the reality stars want a peaceful resolution with their brother’s fianceé. “Chyna filing and using their last name takes some time and discussion,” the insider tells Us. “They are hoping to resolve it amicably, the girls, because they do love Chyna. The girls are just protecting their interests because that is their brand. It’s a complicated business issue.”

The Lashed Bar salon owner has not yet tied the knot with the 29-year-old Arthur George sock designer. Chyna has previously said that the couple will focus on raising baby Dream before planning their nuptials. “We have a date picked out. I obviously wanted to do it when I wasn’t pregnant so we could turn up,” she told Ryan Seacrest in September. “We’re just doing one step at a time. Like first the baby and having these things come first, and then I feel like the wedding will follow after. I feel like the baby is more important right at this moment.” She added that some of Rob’s sisters will “for sure” serve as bridesmaids on the big day.